By Larry Fine SPRINGFIELD, New Jersey (Reuters) - Texan Jimmy Walker has been working mighty hard to turn his game around and thinks it is only fair to see some results. At venerable Baltusrol Golf Club on Thursday, Walker enjoyed the fruits of his labors and the sight of birdie putts falling into the cup as he claimed the first-round lead at the PGA Championship. Walker, who won five tournaments over the previous two seasons but has not cracked into the top 10 of an event since early March, collected six birdies and one bogey in registering a five-under 65 for a one-shot lead in the year's final major.
